static int find_vdso_map(void **start, void **end)
{
	FILE *maps;
	char line[128];
	int found = 0;

	maps = fopen("/proc/self/maps", "r");
	if (!maps) {
		fprintf(stderr, "vdso: cannot open maps\n");
		return -1;
	}

	while (!found && fgets(line, sizeof(line), maps)) {
		int m = -1;

		/* We care only about private r-x mappings. */
		if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n",
				start, end, &m))
			continue;
		if (m < 0)
			continue;

		if (!strncmp(&line[m], VDSO__MAP_NAME,
			     sizeof(VDSO__MAP_NAME) - 1))
			found = 1;
	}

	fclose(maps);
	return !found;
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=b6789123bccba8b5feb9901ed2e8c3c39181979d'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?id=b6789123bccba8b5feb9901ed2e8c3c39181979d'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc?id=b6789123bccba8b5feb9901ed2e8c3c39181979d'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs?id=b6789123bccba8b5feb9901ed2e8c3c39181979d'>codecs</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/wm8993.c?id=b6789123bccba8b5feb9901ed2e8c3c39181979d'>wm8993.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/wm8993.c?id=b6789123bccba8b5feb9901ed2e8c3c39181979d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>